Why am I spotting on Natazia after less than two weeks and I haven't missed any pills?

I had my period for a week before starting Natazia. I have been on this pill for 12 days and now I'm spotting. Also it isn't just brown spotting it is full on red blood. I haven't missed any pills. I don't know what to do. Should I double up on the pill like I used to (on sprintec) when this happened or not? I'm supposed to give it 3 months and I'm at a loss for how to proceed from here.